Peptide exhibiting wrinkle-improving activity and uses thereof

ABSTRACT

The present disclosure relates to a peptide consisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4, a pharmaceutical composition for preventing or treating skin disease including the peptide, a cosmetic composition for skin condition improvement including the peptide, a food composition for skin condition improvement including the peptide, a method of preventing or treating skin disease using the peptide, and a use of the peptide in preventing or treating skin disease or improving skin condition.

TECHNICAL FIELD

The present disclosure relates to a peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4, a pharmaceutical composition forpreventing or treating skin disease including the peptide, a cosmeticcomposition for skin condition improvement including the peptide, a foodcomposition for skin condition improvement including the peptide, amethod of preventing or treating skin disease using the peptide, and ause of the peptide in preventing or treating skin disease or improvingskin condition.

BACKGROUND ART

Human skin constantly changes, the most representative of which isdeterioration of skin function and decrease of visual beauty due toaging. Skin aging is classified into endogenous aging due to geneticfactors and exogenous aging due to external environmental factors suchas sunlight.

Wrinkles are formed on the skin due to aging, and representative wrinkleformation factors include active oxygen, ultraviolet rays, and decreasein collagen biosynthesis. In the case of endogenous aging of the skin,artificial control is not possible, but in the case of exogenous aging,aging may be prevented, treated, or delayed by removing active oxygen,proliferating fibroblasts, and promoting collagen biosynthesis.

DESCRIPTION OF EMBODIMENTS Technical Problem

The present inventors have endeavored to develop an excellent peptidehaving biologically effective activity. As a result, it was found that apeptide including an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4 maybe effectively used in improving skin wrinkle, thereby completing thepresent disclosure.

An object of the present disclosure is to provide a peptide consistingof an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4.

Another object of the present disclosure is to provide a pharmaceuticalcomposition for preventing or treating skin disease including at leastone peptide selected from the group consisting of a peptide consistingof an amino acid sequence of SEQ ID NO: 1 or 2.

Still another object of the present disclosure is to provide a cosmeticcomposition for skin condition improvement including at least onepeptide selected from the group consisting of a peptide consisting of anamino acid sequence of SEQ ID NO: 1, 2, 3, or 4.

Still another object of the present disclosure is to provide a foodcomposition for skin condition improvement including at least onepeptide selected from the group consisting of a peptide consisting of anamino acid sequence of SEQ ID NO: 1, 2, 3, or 4.

Still another object of the present disclosure is to provide a method ofpreventing or treating skin disease using a peptide consisting of anamino acid sequence of SEQ ID NO: 1 or 2.

Still another object of the present disclosure is to provide a use of apeptide consisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4in improving skin condition.

Still another object of the present disclosure is to provide a use of apeptide consisting of an amino acid sequence of SEQ ID NO: 1 or 2 inpreventing or treating skin disease.

Solution to Problem

The present disclosure relates to a peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4, a pharmaceutical composition forpreventing or treating skin disease including the peptide, a cosmeticcomposition for skin condition improvement including the peptide, a foodcomposition for skin condition improvement including the peptide, amethod of preventing or treating skin disease using the peptide, and ause of the peptide in preventing or treating skin disease or improvingskin condition.

Representative features of a skin wrinkle area are decreased level ofextracellular matrix proteins (ECM), such as collagen, elastin, andfibronectin levels, which constitute dermis.

In order to exhibit the effect of improving skin wrinkles, it isnecessary to show the effect of increasing the expression of ECMmolecules by promoting proliferation and activation of fibroblasts,which are the main cells constituting the dermis. In order to confirmthe efficacy of these peptides, MTT assay, MAPK, AKT phosphorylationlevel test (phosphorylation form is the active form of signalingmolecules associated with cell proliferation), collagen, elastin, andfibronectin expression test (identification of mRNA levels by RT-PCR andprotein levels by ELISA) were carried out. As a result, positive effectswere shown.

In addition, by observing the effect of promoting the proliferation ofkeratinocytes, which are epidermal constituent cells, and increasing theexpression of HA, AQP3, and SIRT1, it was confirmed that the peptide hasan effect of inhibiting external stimulation by barrier strengthening.

Hereinafter, the present disclosure will be described in further detail.

An aspect of the present disclosure relates to a peptide consisting ofan amino acid sequence of SEQ ID NO: 1, 2, 3, or 4.

In the peptide, an N-terminal and/or C-terminal modification may beinduced to select a portion of the amino acid sequence and increase itsactivity. Such N-terminal and/or C-terminal modification maysignificantly improve stability of the peptide of the presentdisclosure. For example, the half-life in vivo administration of thepeptide may be increased.

The N-terminal of the peptide may be modified by being linked to aprotecting group selected from the group consisting of an acetyl group,a fluorenylmethoxycarbonyl group, a formyl group, a palmitoyl group, amyristyl group, a stearyl group, and a polyethylene glycol (PEG).

The C-terminal of the peptide may be modified by being linked to ahydroxyl group (—OH), an amino group (—NH₂), an azide group (—NHNH₂), orthe like, but is not limited thereto.

The protecting group acts to protect the peptide of the presentinvention against attack of a protein cleavage enzyme in vivo.

An aspect of the present disclosure relates to a pharmaceuticalcomposition for preventing or treating skin disease including at leastone peptide selected from the group consisting of a peptide consistingof an amino acid sequence of SEQ ID NO: 1 or 2.

The skin disease may be psoriasis, atopic dermatitis, non-allergicdermatitis, and xeroderma, but is not limited thereto.

The pharmaceutical composition may comprise a pharmaceutically effectiveamount of at least one peptide selected from the group consisting of apeptide consisting of an amino acid sequence of SEQ ID NO: 1 or 2.

In addition, the pharmaceutical composition may further include apharmaceutically acceptable carrier.

The pharmaceutically acceptable carrier may be any suitable carriergenerally included in preparation. The pharmaceutically acceptablecarrier may include lactose, dextrose, sucrose, sorbitol, mannitol,starch, acacia rubber, calcium phosphate, alginate, gelatin, calciumsilicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose,water, syrup, methyl cellulose, methylhydroxybenzoate,propylhydroxybenzoate, talc, magnesium stearate, and mineral oil, but isnot limited thereto. The pharmaceutically acceptable carrier andpreparation that are suitable for use are described in detail inRemington’s Pharmaceutical Sciences (19th ed., 1995).

The pharmaceutical composition may further include, in addition to theforegoing ingredients, a lubricant, a humectant, a sweetener, aflavoring agent, an emulsifier, a suspension, or a preservative, but isnot limited thereto.

The pharmaceutical composition may be orally or parenterallyadministered. Preferably, the pharmaceutical composition may beparenterally administered. Parental administration may be intramuscularadministration, intravenous administration, subcutaneous administration,intraperitoneal administration, local administration, or dermaladministration, but is not limited thereto.

The dosage of the pharmaceutical composition may be in a range of 0.0001microgram (µg) to 1,000 µg (0.001 µg to 1,000 µg, 0.01 µg to 1,000 µg,0.1 µg to 1,000 µg, or 1.0 µg to 1,000 µg) per day, but is not limitedthereto. Prescription may vary depending on the preparation method,administration method, age, weight, sex, pathological condition, food,administration time, administration route, excretion rate, andresponsiveness of the patient.

The pharmaceutical composition may be prepared in a form of a unit doseby formulating it with a pharmaceutically acceptable carrier and/orexcipient or prepared in a multi-dose container according to a methodwhich may be easily carried out by one of ordinary skill in the art towhich the present invention belongs.

The formulation may be in a form of solutions, suspensions, or emulsionsin oils or aqueous media or in a form of excipients, powders, granules,tablets, or capsules, and may additionally contain dispersing agentsand/or stabilizers.

Still another aspect of the present disclosure relates to a foodcomposition for skin condition improvement including as an activeingredient at least one peptide selected from the group consisting of apeptide consisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4

The skin condition improvement may be wrinkle improvement, skinregeneration, skin elasticity improvement, skin aging inhibition, woundregeneration, acne improvement, skin regeneration, or skin whitening,but is not limited thereto.

The food may be various foods, beverages, food additives, and the like.

An amount of the peptide as an active ingredient contained in the foodcomposition is not particularly limited and may be properly controlleddepending on a type of food or a desired used thereof. For example, anamount of the peptide may be added in a range of 0.01% to 15% by weightof the total food weight, and an amount of the peptide may be added to ahealth beverage composition in a range of 0.02 g to 10 g, preferably 0.3g to 1 g based on 100 mL.

When the food is a beverage, liquid components are not particularlylimited except that the peptide is contained as an essential ingredientin the indicated ratio, and the beverage may contain additionalingredients such as various flavoring agents or natural carbohydrates asin general beverages.

Examples of the natural carbohydrates include conventional sugars, suchas monosaccharides, e.g., glucose, fructose, and the like;disaccharides, e.g., maltose, sucrose, and the like; andpolysaccharides, e.g., dextrin, cyclodextrin, and sugar alcohols such asxylitol, sorbitol, and erythritol.

As a flavoring agent other than the above-mentioned, a natural flavoringagent (taumartin or a stevia extract, e.g., rebaudioside A,glycyrrhizin, or the like); and a synthetic flavoring agent such assaccharin, aspartame. and the like may be used. A ratio of such naturalcarbohydrates may be generally about 1 g to 20 g, preferably 5 g to 12 gper 100 mL of the composition of the present disclosure.

In addition to the above, the food composition of the present disclosuremay contain various nutrients, vitamins, minerals (electrolytes),flavors such as synthetic and natural flavors, coloring agents andneutralizing agents (cheese, chocolate, etc.), pectic acid and saltsthereof, alginic acid and salts thereof, organic acids, protectivecolloidal thickeners, pH adjusters, stabilizers, preservatives,glycerin, alcohols, carbonation agents used in carbonated beverages, andthe like.

In addition, the food composition of the present disclosure may containflesh for the production of natural fruit juices, fruit juice drinks,and vegetable drinks. These components may be used independently or incombination. A ratio of such additives is not critical but is generallyin a range of 0 to about 20 parts by weight per 100 parts by weight ofthe composition of the present disclosure.

Still another aspect of the present disclosure relates to a cosmeticcomposition for skin condition improvement including at least oneselected from the group consisting of a peptide consisting of an aminoacid sequence of SEQ ID NO: 1, 2, 3, or 4.

The skin condition improvement may be wrinkle improvement, skinregeneration, skin elasticity improvement, skin aging inhibition, woundregeneration, acne improvement, skin regeneration, or skin whitening,but is not limited thereto.

The cosmetic composition may include: (a) a cosmetically effectiveamount of the peptide of the present disclosure and/or (b) acosmetically acceptable carrier, but is not limited thereto.

The term “cosmetic effective amount” as used herein means an amountsufficient to achieve the skin improving efficacy of the composition ofthe present disclosure described above.

The cosmetic composition may be prepared in any formulationconventionally prepared in the art, for example, solutions, suspensions,emulsions, pastes, gels, creams, lotions, powders, soaps,surfactant-containing cleansing, oils, powder foundations, emulsionfoundations, wax foundations, sprays, and the like, but is not limitedthereto. More specifically, the cosmetic composition may be prepared inthe form of a flexible lotion, nutrition lotion, nutrition cream,massage cream, essence, eye cream, cleansing cream, cleansing foam,cleansing water, pack, spray, or powder.

When a formulation of a cosmetic product of the present disclosure is apaste, cream, or gel, animal oils, vegetable oils, waxes, paraffins,starches, trachants, cellulose derivatives, polyethylene glycols,silicones, bentonites, silicas, talc or zinc oxide may be used as acarrier component.

When a formulation of a cosmetic product of the present disclosure ispowder or spray, lactose, talc, silica, aluminum hydroxide, calciumsilicate, or polyamide powder may be used as a carrier component. Inparticular, in the case of spray, a propellant such aschlorofluorohydrocarbon, propane/butane, or dimethyl ether may befurther included.

When a formulation of a cosmetic product of the present disclosure is asolution or emulsion, a solvent, a solubilizer, or an emulsifier is usedas a carrier component, such as water, ethanol, isopropanol, ethylcarbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propyleneglycol, 1,3-butylglycol oil, glycerol aliphatic ester, polyethyleneglycol, or fatty acid esters of sorbitan.

When a formulation of a cosmetic product of the present disclosure is asuspension, a liquid diluent such as water, ethanol, or propyleneglycol, a suspending agent such as ethoxylated isostearyl alcohol,polyoxyethylene sorbitol ester, and polyoxyethylene sorbitan ester,microcrystalline cellulose, aluminum metahydroxide, bentonite, agar, ortracant may be used as a carrier component.

When a formulation of a cosmetic product of the present disclosure is asurfactant-containing cleansing, as a carrier component, aliphaticalcohol sulfate, aliphatic alcohol ether sulfate, sulfosuccinic acidmonoester, isethionate, an imidazolinium derivative, methyltaurate,sarcosinate, fatty acid amide ether sulfate, alkylamidobetaine,aliphatic alcohol, fatty acid glyceride, fatty acid diethanolamide,vegetable oil, a lanolin derivative, or ethoxylated glycerol fatty acidester may be used.

Components included in the cosmetic composition of the presentdisclosure include components conventionally used in cosmeticcompositions, in addition to a peptide and a carrier component as activeingredients, for example, conventional adjuvants such as antioxidants,stabilizers, solubilizers, vitamins, pigments, and flavorings.

The term “skin condition improvement” as used herein encompasses aprocess of treating, alleviating, or relieving damage to skin caused byintrinsic or extrinsic factors of the skin or its effect. For example,the term may mean alleviating or improving inflammation in skin, but itis not limited thereto.

Still another aspect of the present disclosure relates to a use of apeptide consisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4in improving skin condition.

The skin condition improvement may be wrinkle improvement, skinregeneration, skin elasticity improvement, skin aging inhibition, woundregeneration, acne improvement, skin regeneration, or skin whitening,but is not limited thereto.

Still another aspect of the present disclosure relates to a use of apeptide consisting of an amino acid sequence of SEQ ID NO: 1 or 2 inpreventing or treating skin disease.

The skin disease may be psoriasis, atopic dermatitis, non-allergicdermatitis, and xeroderma, but is not limited thereto.

The peptide consisting of an amino acid sequence of SEQ ID NO: 1 or 2 isthe same as those described above.

The term “peptide” as used herein refers to a linear molecule formed bybinding amino acid residues to each other by peptide bonds. The peptidesof the present disclosure may be prepared by chemical synthesis methodsknown in the art, in particular solid-phase synthesis techniques(solid-phase synthesis techniques; Merrifield, J. Amer. Chem. Soc.85:2149-54(1963); Stewart, et al., Solid Phase Peptide Synthesis, 2nd.ed., Pierce Chem. Co.: Rockford, 111(1984)) or liquid phase synthesistechnology (US Pat. No. 5,516,891).

The term “stability” as used herein means not only in vivo stability butalso storage stability (e.g., room temperature storage stability).

The term “pharmaceutically effective amount” as used herein means anamount sufficient to achieve the efficacy or activity of the peptidesdescribed above.

Advantageous Effects of Disclosure

The present disclosure relates to a peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4, a pharmaceutical composition forpreventing or treating skin disease including the peptide, a cosmeticcomposition for skin condition improvement including the peptide, a foodcomposition for skin condition improvement including the peptide, amethod of preventing or treating skin disease using the peptide, and ause of the peptide in preventing or treating skin disease or improvingskin condition.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a graph showing evaluation results of proliferation offibroblasts of a peptide consisting of an amino acid sequence of SEQ IDNO: 1 according to an embodiment the present disclosure;

FIG. 2 is a graph showing evaluation results of proliferation offibroblasts of a peptide consisting of an amino acid sequence of SEQ IDNO: 2 according to an embodiment the present disclosure;

FIG. 3 is a graph showing evaluation results of proliferation offibroblasts of a peptide consisting of an amino acid sequence of SEQ IDNO: 3 according to an embodiment the present disclosure;

FIG. 4 is a graph showing evaluation results of proliferation offibroblasts of a peptide consisting of an amino acid sequence of SEQ IDNO: 4 according to an embodiment the present disclosure;

FIG. 5 is a graph showing evaluation results of proliferation ofkeratinocytes of a peptide consisting of an amino acid sequence of SEQID NO: 1 according to an embodiment the present disclosure;

FIG. 6 is a graph showing evaluation results of proliferation ofkeratinocytes of a peptide consisting of an amino acid sequence of SEQID NO: 2 according to an embodiment the present disclosure;

FIG. 7 is a graph showing evaluation results of proliferation ofkeratinocytes of a peptide consisting of an amino acid sequence of SEQID NO: 3 according to an embodiment the present disclosure;

FIG. 8 is a graph showing evaluation results of proliferation ofkeratinocytes of a peptide consisting of an amino acid sequence of SEQID NO: 4 according to an embodiment the present disclosure;

FIG. 9 is an image showing measurement results of phosphorylation levelof MAPK (AKT elimination) in fibroblasts of a peptide consisting of anamino acid sequence of SEQ ID NO: 1 according to an embodiment thepresent disclosure;

FIG. 10 is an image showing measurement results of phosphorylation levelof MAPK (AKT elimination) in fibroblasts of a peptide consisting of anamino acid sequence of SEQ ID NO: 2 according to an embodiment thepresent disclosure;

FIG. 11 is an image showing measurement results of phosphorylation levelof MAPK and AKT in fibroblasts of a peptide consisting of an amino acidsequence of SEQ ID NO: 3 according to an embodiment the presentdisclosure;

FIG. 12 is an image showing measurement results of phosphorylation levelof MAPK and AKT in fibroblasts of a peptide consisting of an amino acidsequence of SEQ ID NO: 4 according to an embodiment the presentdisclosure;

FIG. 13 is an image showing measurement results of phosphorylation levelof MAPK (AKT elimination) in keratinocytes of a peptide consisting of anamino acid sequence of SEQ ID NO: 1 according to an embodiment thepresent disclosure;

FIG. 14 is an image showing measurement results of phosphorylation levelof MAPK (AKT elimination) in keratinocytes of a peptide consisting of anamino acid sequence of SEQ ID NO: 2 according to an embodiment thepresent disclosure;

FIG. 15 is an image showing results of collagen1a, fibronectin andelastin RT-PCR of a peptide consisting of an amino acid sequence of SEQID NO: 1 according to the embodiment of the present disclosure;

FIG. 16 is an image showing results of collagen1a, fibronectin andelastin RT-PCR of a peptide consisting of an amino acid sequence of SEQID NO: 2 according to the embodiment of the present disclosure;

FIG. 17 is an image showing results of collagen1a, fibronectin andelastin RT-PCR of a peptide consisting of an amino acid sequence of SEQID NO: 3 according to the embodiment of the present disclosure;

FIG. 18 is an image showing results of collagen1a, fibronectin andelastin RT-PCR of a peptide consisting of an amino acid sequence of SEQID NO: 4 according to the embodiment of the present disclosure;

FIG. 19 is an image showing results of AQP3 (Aquaporin 3) RT-PCR of apeptide consisting of an amino acid sequence of SEQ ID NO: 1 accordingto the embodiment of the present disclosure;

FIG. 20 is an image showing results of SIRT1 RT-PCR of a peptideconsisting of an amino acid sequence of SEQ ID NO: 1 according to theembodiment of the present disclosure;

FIG. 21 is an image showing results of AQP3 (Aquaporin 3) RT-PCR of apeptide consisting of an amino acid sequence of SEQ ID NO: 2 accordingto the embodiment of the present disclosure;

FIG. 22 is an image showing measurement results of an expression amountof collagen1a of a peptide consisting of an amino acid sequence of SEQID NO: 1 according to the embodiment of the present disclosure;

FIG. 23 is an image showing measurement results of an expression amountof fibronectin of a peptide consisting of an amino acid sequence of SEQID NO: 1 according to the embodiment of the present disclosure;

FIG. 24 is an image showing measurement results of an expression amountof elastin of a peptide consisting of an amino acid sequence of SEQ IDNO: 1 according to the embodiment of the present disclosure;

FIG. 25 is an image showing measurement results of an expression amountof collagen1a of a peptide consisting of an amino acid sequence of SEQID NO: 2 according to the embodiment of the present disclosure;

FIG. 26 is an image showing measurement results of an expression amountof fibronectin of a peptide consisting of an amino acid sequence of SEQID NO: 2 according to the embodiment of the present disclosure;

FIG. 27 is an image showing measurement results of an expression amountof elastin of a peptide consisting of an amino acid sequence of SEQ IDNO: 2 according to the embodiment of the present disclosure;

FIG. 28 is an image showing results of Procollagen1a ELISA of a peptideconsisting of an amino acid sequence of SEQ ID NO: 1 according to theembodiment of the present disclosure;

FIG. 29 is an image showing results of Procollagen1a ELISA of a peptideconsisting of an amino acid sequence of SEQ ID NO: 2 according to theembodiment of the present disclosure;

FIG. 30 is an image showing results of Procollagen1a ELISA of a peptideconsisting of an amino acid sequence of SEQ ID NO: 3 according to theembodiment of the present disclosure;

FIG. 31 is an image showing results of Procollagen1a ELISA of a peptideconsisting of an amino acid sequence of SEQ ID NO: 4 according to theembodiment of the present disclosure; and

FIG. 32 is an image showing results of HA ELISA of a peptide consistingof an amino acid sequence of SEQ ID NO: 2 according to the embodiment ofthe present disclosure;

BEST MODE

The present disclosure relates to a peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4.

MODE OF DISCLOSURE

Hereinafter, the present invention will be described in further detailwith reference to Examples. However, these Examples are for illustrativepurposes only, and the present disclosure is not intended to be limitedby these Examples.

Synthesis Example 1: Synthesis of Peptide

70 g of chlorotrityl chloride resin (CTC resin, Nova biochem Cat No.01-64-0021) was placed in a reaction vessel, and 490 mL of methylenechloride (MC) was added thereto and stirred for 3 minutes. Then, thesolution was removed, 490 mL of dimethylformamide (DMF) was addedthereto, the mixture was stirred for 3 minutes, and then the solvent wasremoved. 700 mL of dichloromethane solution was added to the reactor,and 200 mmole of Fmoc—Tyr (tBu)—OH (Bachem, Switzerland) and 400 mmoleof diisopropylethylamine (DIEA) were added thereto followed by stirringand dissolving. The reaction was carried out with stirring for 1 hour.After washing, methanol and DIEA (2:1) were dissolved in dechloromethane(DCM), reacted for 10 minutes, and washed with excess DCM/DMF (1:1).Then, the solution was removed, 490 mL of dimethylformamide (DMF) wasadded thereto, the mixture was stirred for 3 minutes, and then thesolvent was removed. 700 mL of a deprotection solution (20%piperidine/DMF) was added to the reaction vessel, stirred at roomtemperature for 10 minutes, and then the solution was removed. The sameamount of a deprotection solution was added thereto, and the reactionwas maintained for 10 minutes. The solution was then removed and washedthree minutes each twice with DMF, once with MC, and once with DMF tothereby prepare Tyr(tBu)-CTC resin.

700 mL of a DMF solution was added to another reactor, and 200 mmole ofFmoc—Arg (Pbf)—OH (Bachem, Switzerland), 200 mmole of HoBt, and 200mmole of HBTu were added thereto, followed by dissolving with stirring.The reactor was charged with 400 mmole DIEA in two portions and stirredfor at least 5 minutes until all the solids dissolved. The dissolvedamino acid mixture solution was placed in a reaction vessel containingthe deprotected resin and allowed to react for 1 hour at roomtemperature with stirring. The reaction solution was removed, and themixture was stirred with DMF solution three times for 5 minutes and thenremoved. A small amount of the reaction resin was taken, and the degreeof reaction was checked using a Kaiser test (Nihydrin Test).Arg(Pbf)—Tyr(tBu)—CTC resin was prepared by the same deprotectionreaction twice as described above using the deprotection solution. Afterthoroughly washing with DMF and MC and once again performing a Kaisertest, the following amino acid adhesion experiment was performed asdescribed above. Fmoc—Gly—OH, Fmoc—Gly—OH, Fmoc—Gly—OH, Fmoc—Trp—OH,Fmoc—Lys(Boc)—OH were sequenced according to the selected amino acidsequence. The Fmoc-protecting group was reacted twice with thedeprotecting solution for 10 minutes, followed by washing for removingthe solution. Peptidyl resin was washed three times each with DMF, MCand methanol, dried slowly by flowing nitrogen air, and then completelydried by vacuum under reduced pressure in P₂O₅, followed by addition of1,900 mL of a deodorant solution (trifluroacetic acid 81.5%, distilledwater 5.0%, thioanisole 5.0%, phenol 5.0%, ethanedithiol (EDT) 2.5%, andtriisopropylsilane (TIS) 1.0%). The mixture was then shaken at roomtemperature, and the reaction was maintained for 2 hours. The resin wasfiltered, and the resin was washed with a small amount of TFA solutionand then combined with the mother liquid. 2,090 mL of the combinedmother liquid was added with cold ether to induce precipitation, and theprecipitate was collected by centrifugation and washed twice with coldether. The mother liquid was removed and sufficiently dried undernitrogen to synthesize 79.8 g of the peptide consisting of SEQ ID NO: 1before purification (yield: 97.0%). The molecular weight was 822.9(theoretical value: 822.9) when the molecular weight was measured usinga molecular weight analyzer.

The peptide consisting of an amino acid sequence of SEQ ID NO: 2, SEQ IDNO: 3, or SEQ ID NO: 4 was synthesized in the same manner as describedabove.

TABLE 1 SEQ ID NO. Sequence listing Analysis value (mass analyzer)Analytical value Theoretical value 1 KWGGGRY 822.9 822.9 2 ILGRWCG 803.9803.9 3 GPVH 408.4 408.4 4 EDEFKPPAAGR 1216.3 1216.3

Example 1. Assessment of Promotion of Proliferation of Fibroblasts

Mouse fibroblast NIH3T3 was seeded in a 96-well plate at a density of5×10³ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% serum-containing media. Then, treatment with thepositive control, i.e., 100 nM bFGF, and 10 µM or 50 µM of the peptideconsisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4 wereperformed and cultured for 3 days. Then, 4 mg/mL MTT solution treatmentwas performed, and the reaction was carried out for 4 hours. Then, theresulting formazan was dissolved by treatment with dimethyl sulfoxide(hereinafter referred to as “DMSO”), and the absorbance at 560 nm wasmeasured using a microplate reader. The results are shown in FIGS. 1 to4 and Table 2.

TABLE 2 Fibroblast proliferation (%) FIG. 1 Control SEQ ID NO: 1 bFGF 10µM 50 µM (100 nM) 100 170 194 279 FIG. 2 Control SEQ ID NO: 2 bFGF 10 µM50 µM (100 nM) 100 188 253 400 FIG. 3 Control SEQ ID NO: 3 bFGF 10 µM 50µM (100 nM) 100 194 261 386 FIG. 4 Control SEQ ID NO: 4 bFGF 10 µM 50 µM(100 nM) 100 114 193 386

As shown in FIGS. 1 to 4 and Table 2, the peptide consisting of an aminoacid sequence of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, or SEQ ID NO:4 was found to promote fibroblast proliferation.

Example 2. Assessment of Promotion of Proliferation of Keratinocytes

Human keratinocyte HaCaT was seeded in a 6-well plate at a density of3×10⁵ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% serum-containing media. Then, treatment with thepositive control, i.e., 10 nM EGF, and 10 µM or 50 µM of the peptideconsisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4 wereperformed and cultured for 3 days. Then, 4 mg/mL MTT solution treatmentwas performed, and the reaction was carried out for 4 hours. Then, theresulting formazan was dissolved by treatment with dimethyl sulfoxide(hereinafter referred to as “DMSO”), and the absorbance at 560 nm wasmeasured using a microplate reader. The results are shown in FIGS. 5 to8 and Table 3.

TABLE 3 Keratinocyte proliferation (%) FIG. 5 Control SEQ ID NO: 1 EGF10 µM 50 µM (10 nM) 100 120 136 142 FIG. 6 Control SEQ ID NO: 2 EGF 10µM 50 µM (10 nM) 100 111 119 152 FIG. 7 Control SEQ ID NO: 3 EGF 10 µM50 µM (10 nM) 100 183 197 187 FIG. 8 Control SEQ ID NO: 4 EGF 10 µM 50µM (10 nM) 100 113 142 187

Example 3. Measurement of Phosphorylation Level of MAPK and AKT 3-1.Fibroblasts

Mouse fibroblast NIH3T3 was seeded in a 6-well plate at a density of5×10³ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% FBS-containing media. Then, treatment with thepositive control, i.e., 100 nM bFGF, and 10 µM or 50 µM of the peptideconsisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4 wereperformed and cultured for 30 minutes. Then, the cells were collected toprepare cell lysate. Then, western blotting was performed using P-MAPK(p-Erk, p-JNK, p-p38) and p-Akt or actin antibody (SantacruzBiotechnology, USA). The comparison results of phosphorylation aspectsthereof are shown in FIGS. 9 to 12 .

As shown in FIGS. 9 to 12 , the peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4 was found to exhibit effects ofpromoting proliferation by activation of MAPK (ERK, p38, and JNK) andAKT, i.e., signaling factors involved in proliferation of fibroblasts.

3-2. Keratinocytes

Human keratinocyte HaCaT was seeded in a 6-well plate at a density of3×10⁵ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% FBS-containing media. Then, treatment with thepositive control, i.e., 10 nM EGF, and 10 µM or 50 µM of the peptideconsisting of an amino acid sequence of SEQ ID NO: 1 or 2 were performedand cultured for 30 minutes. Then, the cells were collected to preparecell lysate. Then, western blotting was performed using P-MAPK (p-Erk,p-JNK, p-p38) and p-Akt antibody (Santacruz Biotechnology, USA). Thecomparison results of phosphorylation aspects thereof are shown in FIGS.13 and 14 .

As shown in FIGS. 13 and 14 , the peptide consisting of an amino acidsequence of SEQ ID NO: 1 or 2 was found to exhibit effects of promotingproliferation by activation of ERK and p38, i.e., signaling factorsinvolved in proliferation of human keratinocytes.

Example 4. RT-PCR of Collagen1a, Fibronectin, and Elastin

Mouse fibroblast NIH3T3 was seeded in a 6-well plate at a density of5×10³ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% FBS-containing media, followed by culturing for 4hours. Then, treatment with the positive control, i.e., 100 nM IGF-1,and 10 µM or 50 µM of the peptide consisting of an amino acid sequenceof SEQ ID NO: 1, 2, 3, or 4 were performed and cultured for 24 hours.Then, the cells were cultured and collected to isolate RNA. cDNA wassynthesized using a cDNA synthesis kit (Intron, Korea) afterquantification of RNA, and PCR was carried out using primers of each ofPCR premix (Intron, Korea) and collagen1a, fibronectin, elastin, GAPDHin Table 4. Then, the cells were run on 5 % agarose gel, and degrees ofmRNA expression of the growth factors were compared in each peptidetreatment condition. The results are shown in FIGS. 15 to 18 .

TABLE 4 Sequence ID No. Primer Sequence (5′-3′) 5 Collagen1a_FCACCCTCAAGAGCCTGAGTC 6 Collagen1a_R AGACGGCTGAGTAGGGAACA 7 Fibronectin_FCCAGGAACCGAGTACACCAT 8 Fibronectin_R ATACCCAGGTTGGGTGATGA 9 Elastin_FGGACCCCTGACTCGCGACCT 10 Elastin_R GGGGAGGTGGGACTGCCCAA 11 GAPDH_FGGTGTGAACGGATTTGGCCGTATTG 12 GAPDH_R CCGTTGAATTTGCCGTGAGTGGAGT

As shown in FIGS. 15 to 18 , the peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4 shows effects of increasingexpression of mRNA of collagen, fibronectin, and elastin as constituentsof ECM through promoting fibroblast activity, respectively.

Example 5. RT-PCR of AQP3 (Aquaporin3) and SIRT1

Human keratinocyte HaCaT was seeded in a 6-well plate at a density of3×10⁵ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% FBS-containing media, followed by culturing for 4hours. Then, treatment with the positive control, i.e., 100 nM EGF, and10 µM or 50 µM of the peptide consisting of an amino acid sequence ofSEQ ID NO: 1 or 2 were performed and cultured for 24 hours. Then, thecells were cultured and collected to isolate RNA. cDNA was synthesizedusing a cDNA synthesis kit (Intron, Korea) after quantification of RNA,and PCR was carried out using primers of each of PCR premix (Intron,Korea) and AQP3, SIRT1, and GAPDH in Table 5. Then, the cells were runon 5% agarose gel, and degrees of mRNA expression of the growth factorswere compared in each peptide treatment condition. The results are shownin FIGS. 19 to 21 .

TABLE 5 Sequence ID No. Primer Sequence (5′-3′) 13 AQP3_FCCTTCTTGGGTGCTGGAATA 14 AQP3_R ACACGATAAGGGAGGCTCTG 15 SIRT1_FTCAGTGGCTGGAACAGTGAG 16 SIRT1_R TCTGGCATGTCCCACTATCA

As shown in FIGS. 19 to 21 , the peptide consisting of an amino acidsequence of SEQ ID NO: 1 or 2 shows effects of increasing AQP3expression, which is a protein related to skin barrier enhancementthrough promotion of keratinocyte activation.

Example 6. RT-PCR of Collagen1a, Fibronectin, and Elastin

Mouse fibroblast NIH3T3 was seeded in a 6-well plate at a density of5×10³ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% serum-free media. Then, treatment with thepositive control, i.e., 100 nM EGF, and the peptide consisting of anamino acid sequence of SEQ ID NO: 1 or 2 were performed and cultured for24 hours. Then, the cells were fixed for 30 minutes using 4%paraformaldehyde. Then, after washing 3 times, the cells were reactedwith 0.5% Triton X-100 for 15 minutes and washed again 3 times. Then, 3%BSA was blocked for 1 hour and the primary antibody (1: 100) forcollagen 1a, fibronectin, and elastin was reacted overnight at 4° C.Then, the secondary antibody (1:500) was reacted at room temperature for2 hours, stained with DAPI staining, and observation was made with afluorescence microscope. The results thereof are shown in FIGS. 22 to 27.

As shown in FIGS. 22 to 27 , the peptide consisting of an amino acidsequence of SEQ ID NO: 1 or 2 shows effects of increasing expression ofproteins of collagen, fibronectin, and elastin as constituents of ECMthrough promoting fibroblast activity, respectively.

Example 7. Procollagen1a ELISA

Mouse fibroblast NIH3T3 was seeded in a 6-well plate at a density of5×10³ cells/well, and then cultured overnight. Subsequently, the mediawere changed to 0.05% FBS-containing media, followed by culturing for 4hours. Then, treatment with the positive control, i.e., 100 nM IGF-1,and the peptide consisting of an amino acid sequence of SEQ ID NO: 1, 2,3, or 4 were performed and cultured for 72 hours. Then, the media werecollected. The amount in the medium was measured using Procollagen1aELISA kit (Usbiological Lifescience, USA). The results thereof are shownin FIGS. 28 to 31 and Table 6.

TABLE 6 Procollagen1a expression (%) FIG. 28 Control SEQ ID NO: 1 IGF-110 µM 50 µM (100 nM) 100 98 157 140 FIG. 29 Control SEQ ID NO: 2 IGF-110 µM 50 µM (100 nM) 100 145 146 140 FIG. 30 Control SEQ ID NO: 3 IGF-110 µM 50 µM (100 nM) 100 138 143 113 FIG. 31 Control SEQ ID NO: 4 IGF-110 µM 50 µM (100 nM) 100 122 141 113

As shown in FIGS. 28 to 31 and Table 6, upon treatment with the peptideconsisting of an amino acid sequence of SEQ ID NO: 1, 2, 3, or 4,expression of procollagen1α protein was found to increase infibroblasts.

Example 9. HA ELISA

Human keratinocyte HaCaT was seeded in a 6-well plate at a density of3×10⁵ cells/well, and then cultured overnight. The media were changed to0.05% FBS-containing media, followed by culturing for 4 hours. Then,treatment with the positive control, i.e., 100 nM IGF-1, and the peptideconsisting of an amino acid sequence of SEQ ID NO: 2 were performed andcultured for 72 hours. Then, the media were collected. An HA ELISA kit(Echelon, USA) was used to measure an amount thereof. The resultsthereof are shown in FIG. 32 and Table 7.

TABLE 7 HA expression (ng/mL) FIG. 32 Control SEQ ID NO: 2 IGF-1 10 µM50 µM (100 nM) 251 286 292 280

As shown in FIG. 32 and Table 7, the peptide consisting of an amino acidsequence of SEQ ID NO: 2 shows effects of increasing HA expression,which is a protein related to skin barrier enhancement through promotionof keratinocyte activation.

INDUSTRIAL APPLICABILITY

The present disclosure relates to a peptide consisting of an amino acidsequence of SEQ ID NO: 1, 2, 3, or 4, a pharmaceutical composition forpreventing or treating skin disease including the peptide, a cosmeticcomposition for skin condition improvement including the peptide, a foodcomposition for skin condition improvement including the peptide, amethod of preventing or treating skin disease using the peptide, and ause of the peptide in preventing or treating skin disease or improvingskin condition.

What is claimed is: 1-12. (canceled)
 13. A peptide consisting of theamino acid sequence of SEQ ID NO: 4 having skin condition improvementactivity, optionally wherein (a) the N-terminus of the peptide is linkedto a protecting group, or (b) the C-terminus of the peptide is modified.14. The peptide of claim 13, wherein the skin condition improvement iswrinkle improvement, skin regeneration, skin elasticity improvement,wound regeneration, acne improvement, or skin whitening.
 15. A cosmeticcomposition for skin condition improvement comprising a peptideconsisting of the amino acid sequence of SEQ ID NO: 4, optionallywherein (a) the N-terminus of the peptide is linked to a protectinggroup, or (b) the C-terminus of the peptide is modified.
 16. Thecosmetic composition of claim 15, wherein the skin condition improvementis wrinkle improvement, skin regeneration, skin elasticity improvement,wound regeneration, acne improvement, or skin whitening.
 17. Apharmaceutical composition for treating skin disease comprising apeptide consisting of the amino acid sequence of SEQ ID NO: 4,optionally wherein (a) the N-terminus of the peptide is linked to aprotecting group, or (b) the C-terminus of the peptide is modified. 18.The pharmaceutical composition of claim 17, wherein the skin disease ispsoriasis, atopic dermatitis, non-allergic dermatitis, or xeroderma. 19.A food composition for skin condition improvement comprising a peptideconsisting of the amino acid sequence of SEQ ID NO: 4, optionallywherein (a) the N-terminus of the peptide is linked to a protectinggroup, or (b) the C-terminus of the peptide is modified.
 20. The foodcomposition of claim 19, wherein the skin condition improvement iswrinkle improvement, skin regeneration, skin elasticity improvement,wound regeneration, acne improvement, or skin whitening.
 21. The peptideof claim 13, wherein (a) the N-terminus of the peptide is linked to aprotecting group, which is optionally selected from the group consistingof an acetyl group, a fluorenylmethoxycarbonyl group, a formyl group, apalmitoyl group, a myristyl group, a stearyl group, and a polyethyleneglycol (PEG), or (b) the C-terminus of the peptide is modified,optionally by being linked to a group selected from the group consistingof an amino group (—NH₂), and an azide group (—NHNH₂).
 22. The cosmeticcomposition of claim 15, wherein (a) the N-terminus of the peptide islinked to a protecting group, which is optionally selected from thegroup consisting of an acetyl group, a fluorenylmethoxycarbonyl group, aformyl group, a palmitoyl group, a myristyl group, a stearyl group, anda polyethylene glycol (PEG), or (b) the C-terminus of the peptide ismodified, optionally by being linked to a group selected from the groupconsisting of an amino group (—NH₂), and an azide group (—NHNH₂). 23.The pharmaceutical composition of claim 17, wherein (a) the N-terminusof the peptide is linked to a protecting group, which is optionallyselected from the group consisting of an acetyl group, afluorenylmethoxycarbonyl group, a formyl group, a palmitoyl group, amyristyl group, a stearyl group, and a polyethylene glycol (PEG), or (b)the C-terminus of the peptide is modified, optionally by being linked toa group selected from the group consisting of an amino group (—NH₂), andan azide group (—NHNH₂).
 24. The food composition of claim 19, wherein(a) the N-terminus of the peptide is linked to a protecting group, whichis optionally selected from the group consisting of an acetyl group, afluorenylmethoxycarbonyl group, a formyl group, a palmitoyl group, amyristyl group, a stearyl group, and a polyethylene glycol (PEG), or (b)the C-terminus of the peptide is modified, optionally by being linked toa group selected from the group consisting of an amino group (—NH₂), andan azide group (—NHNH₂).
 25. A method of improving a skin condition of asubject, the method comprising administering a peptide of claim 13 tothe subject.
 26. The method of claim 25, wherein the skin conditionimprovement is wrinkle improvement, skin regeneration, skin elasticityimprovement, wound regeneration, acne improvement, or skin whitening.27. A method of improving a skin condition of a subject, the methodcomprising contacting the skin of the subject with a cosmeticcomposition of claim
 15. 28. The method of claim 27, wherein the skincondition improvement is wrinkle improvement, skin regeneration, skinelasticity improvement, wound regeneration, acne improvement, or skinwhitening.
 29. A method of treating a skin disease in a subject, themethod comprising administering a pharmaceutical composition of claim 17to the subject.
 30. The method of claim 29, wherein the skin disease ispsoriasis, atopic dermatitis, non-allergic dermatitis, or xeroderma. 31.A method of improving a skin condition of a subject, the methodcomprising administering a food composition of claim 19 to the subject.32. The method of claim 31, wherein the skin condition improvement iswrinkle improvement, skin regeneration, skin elasticity improvement,wound regeneration, acne improvement, or skin whitening.